Improvement in devices for cutting screw-threads



ZINA S. OGDEN, 0F 'GLFINS FALLS, YORK..

Letters Patent No. 108,933, dated November 1, 1870.

IMPROVEMENT IN DEVICES FOR CUTTING SCREW-THREADS.

Y' The Schedule referred to In these Letters Patent and making 1oz-nrt;`of the name.

To all whom lit may concern:

Beit known that I, ZINA S. Genux, ot' Glens Falls, in the county-ot'Warren and in the State o`t' New York, have invented certain new anduseful Improvementsvm Die for Cutting Screw; and do hereby declare thatthe following is a full, clear, and exact Idescliption thereof,reference being had to the accompanying drawing and to the letters ofreference' marked thereon, making a part of this specification. Thenature ot' my invention consist-s in the construction and arrangementof' jaws or dies for cutting screws, with the mechanism for operatingthe same,

as will be hereinafter fully set forth.

In order to enable others skilled in the art tol which my inventionappertains to make and use the same, I will now proceed to describe itsconstruction and operation, referringlto the annexed drawing, in whichvFigure 1 is a side view, part in section, of my entire machine, and

Figures 2 and 3 are views of the jaws or dies.

A represents the stock of vmy machine, constructed in thc saine manneras the usual auger-stock. y

At the end of this stock is formed a thick screw, B, which is slottedfrom theend inward for asuitable distance.

In this slot are inserted the two jaws, CVC, which Vare hinged orpivoted together at their inner ends.

The outer ends of these jaws are provided with haltlcylindrical lips aa, having on their inner surfaces teeth e e and longitudinal grooves it,as shown 1n iig. 3.

The jaws thus constructed, being inserted in the slotted screw B, ascrew-sleeve, I), is screwed on said screw B. The outer end of thevsleeve D heilig tapering, as shown iuig. 1, it is, of course, evidentthat,

hy adjusting said sleeve, the distance the jaws O (l are allowed toseparate can be readily regulated, and

hence any-sized screw may be cut with them.

Having thus fully described my invention,

NVhat I claim as new, and desire to secure by Letters Patent, is-

The jaws C C, hingedl together 'and provided with lips a a, having teethe e and grooves/il t, in combinal tion with the stock A, slotted screwB, and tapering screw-sleeve D, all substantially as and for thepurposes herein set forth.

In testimony that I claim the foregoing, I have hereunto set my handthis 7th day of July, 1870.

" ZINA S. OGDEN.

Witnesses:V v v Enocn H. B/osEKnAns, C. MORGAN.

